Halsall, Fred. <br/><br/>
Data communications, computer networks, and open systems / Fred Halsall. 

 - 4th ed. 
 - Wokingham, England ; Reading, Mass. :  Addison-Wesley Pub. Co., c1996. 
 - xvi, 907 p. : ill. ; 25 cm. 
<br/><br/><label>ISBN: </label>020142293X (alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.               Computer networks.               Local area networks (Computer networks)               Computer network protocols.
<br/><br/><label>Dewey Class. No.: </label>004.6 HAL